Code of Practice For Rack Safety Inspections - Industor...Page 2 Version 2.of 22 1 Issued 20/04/2015...

of 22 Version 2.1 Issued 20/04/2015

Code of Practice

For

Rack Safety Inspections

Australian Steel Storage Industry Group

(ASSIG)


Foreword

This Code of Practice on how to manage rack safety inspections is produced by the

Australian Steel Storage Industry Group (ASSIG).

The main objective of this Code of Practice is to set out the framework:

1) For the inspection of steel storage pallet racking solutions across the racking industry

throughout Australia and New Zealand.

2) To recommend the process and quality of conducting inspections and competency of the

inspectors.

3) To ensure that all inspections shall be carried out in accordance with the Work Health &

Safety (WHS) Act and legislation.

By adopting best practices that the industry offers, it will help minimise the potential risk of injury

to personnel, damage to goods & interruption of business.

Disclaimer: The information presented by the Australian Steel Institute in this publication has been prepared for general information only and does not in any way constitute recommendations or professional advice. While every effort has been made and all reasonable care taken to ensure the accuracy of the information contained in this publication, this information should not be used or relied upon for any specific application without investigation and verification as to its accuracy, suitability and applicability by a competent professional person in this regard. The Australian Steel Institute, its officers and employees and the authors and editors of this publication do not give any warranties or make any representations in relation to the information provided herein and to the extent permitted by law (a) will not be held liable or responsible in any way; and (b) expressly disclaim any liability or responsibility for any loss or damage costs or expenses incurred in connection with this publication by any person, whether that person is the purchaser of this publication or not. Without limitation, this includes loss, damage, costs and expenses incurred as a result of the negligence of the authors, editors or publishers.

The information in this publication should not be relied upon as a substitute for independent due diligence, professional or legal advice and in this regards the services of a competent professional person or persons should be sought.


Table of contents

Foreword ............................................................................................................................................ 2

Table of contents ............................................................................................................................... 3

Terminology ....................................................................................................................................... 4

Purpose of Inspections ....................................................................................................................... 4

Rack Inspector Competencies and Qualifications .............................................................................. 5

Inspections ......................................................................................................................................... 7

Safety of the Rack Inspector .............................................................................................................. 7

Racking Inspector Tool List (minimum recommended requirements): ............................................. 8

Damage Control Procedures .............................................................................................................. 8

Methods of Measurement (Fig 1) ...................................................................................................... 8

Damage Evaluation .......................................................................................................................... 10

Damage Action Flow Chart .............................................................................................................. 10

Examples of a Suggested Inspection Process ................................................................................... 12

Assessment of Beams- Vertical Deflection ...................................................................................... 13

Measuring Deflection ....................................................................................................................... 13

Horizontal Beam Deflection ............................................................................................................. 14

Out-of-plumb Racking ...................................................................................................................... 14

Vertical Out-of-plumb (Measurement) ............................................................................................ 14

Finished Tolerances ......................................................................................................................... 15

Inspection Considerations ............................................................................................................... 17


Terminology

Pallet racking: Pallet racking is a material handling storage aid system, designed specifically to store

materials on pallets (or “skids”) and accessed by mechanical handling equipment.

Competent person: A person who has acquired through training, qualification or experience, or a

combination of both the knowledge and skills required to safely carry out a task.

Purpose of Inspections

It is recommended that a system of regular inspections for pallet racking installations shall be

carried out on a regular basis and at least once every 12 months, as a minimum in accordance

with AS 4084-2012 (Ref. AS 4084-2012, Section 8.1 General, and Section 8.2-Inspections, pages

99-100.)

For inspections carried out after a seismic or cyclonic event, it is recommended that the inspector

issue a copy of the inspection report to the manufacturer for their technical review and

comment. A qualified structural engineer may be required to inspect the site subject to the initial

report and findings.

In accordance with AS 4084-2012 inspections shall be carried out to:

(a) Ensure the correct application and use of equipment.

(b) Ensure that the working load limits are adhered to.

(c) Ensure that the racking installation has not been altered. A copy of the load application and

configuration drawings shall be retained for this purpose.

(d) Examine the extent of damage due to impact on the racking installation.

(e) Examine the out of plumb of the racking.

(f) Examine for any dislocation and deformation of sections and connections for uprights and

beams.

(g) Examine connectors for deformation or signs of cracking at the welds.

(h) Examine base plate for anchors.

Additionally, it is recommended that a formal reporting and recording process for all damage and

repairs is carried out.


Rack Inspector Competencies and Qualifications

ASSIG have set minimum qualifications for rack inspectors. The following minimum requirements

of EXPERIENCE, EDUCATION and KNOWLEDGE are recommended as a pre-requisite prior to

understanding further ‘ON THE JOB TRAINING’.

Each company that provides rack inspection services shall demonstrate an evidence-based

structured training programme.

1. EXPERIENCE (proof of evidence must be provided)

Inspectors shall have minimum of 5 years full time experience working in the industry in the role of

either DESIGNER, ENGINEER, INSTALLER, or with similar experience using pallet racking systems,

and minimum ‘on the job’ training of 100 hours, or 50 hours when deemed competent by a Senior

Rack Inspector

OR

Inspectors with competency in using simple measuring equipment in a logical, systematic way

(such as qualified tradesmen) and ability to record results of the survey clearly. Further ‘on the

job’ training is recommended for a minimum period of 200 hours in the presence of a qualified

rack inspector.

2. EDUCATION (proof of successful completion required) Inspectors shall have a minimum level of education qualification as stated below:

a) Construction Industry Safety Card

b) Company Safety Induction course

c) Site specific Safety Induction where applicable

d) Certificate in rack safety inspections Cert III or Cert IV in WHS

3. KNOWLEDGE

Inspectors shall have read and understood the following publications (proof of knowledge during ‘on

the job’ training should form part of demonstrated evidence):

a) Duty of Care provisions for each state authority

b) AS 4084-2012, Sections 1.6, 1.7, 6.4, 6.5, 6.6 and 8

c) BCA access/egress requirements

d) ASSIG Code of Practice for Rack Safety Inspections

e) Company Operator/User manuals

f) Company Rack Inspection manuals Approval may be granted to complete educational qualifications during ‘On the Job’ training.


‘ON THE JOB’ TRAINING

‘On the Job’ training should be undertaken under the guidance of a senior experienced rack

inspector nominated by the company and should cover the following areas of competency:

a. Damage Identification

b. Damage Assessment and Classification

c. Causes of Damage

d. Damage Reporting and Repairs

e. Customer Service

For inspectors with rack design/installation industry experience a minimum period of 100

hours ‘on the job’ training is required before competency can be achieved and recognised, or

50 hours when deemed competent by a Senior Rack Inspector.

For inspectors from outside the rack design/installation industry, a minimum of 200 hours ‘on the

job’ training is required prior to competency assessment and final approved.

Further ‘on the job’ training may be required (at the discretion of the trainer) for successful

completion of the training and final certification.


Inspections All inspections must be carried out by a competent person, fully experienced in the identification

and categorisation of racking damage. It is recommended that persons responsible for warehouse

racking, set up their own damage reporting and maintenance process, along with training

responsible staff, to carry out regular rack damage inspections, additional to any third party

inspections taking place.

Safety of the Rack Inspector Safety of the rack inspector is paramount to a successful inspection:

• Where a customer does not have suitable procedures for personnel interaction and

material handling equipment (MHE), a risk assessment must be written, prior to starting

the inspection.

• Where practicable the aisles are to be barricaded or bunted off to prevent MHE from entering,

or as a minimum signage, or safety cones must be positioned at the ends of the working aisle.

• If barricades and bunting are unacceptable to the customer, it is mandatory for the inspector

to request that ALL operators within the facility are advised of the presence of inspectors

within the warehouse, especially as there may not be designated walkways, separating

pedestrians from MHE.

• Inspectors must be trained in warehouse safety and must be alert at all times to the

potential dangers within the warehouse, especially advancing with caution when entering

or leaving an aisle.

• PPE must be worn at all times, safety shoes and high visibility vests having reflective tape

front and back, both horizontally and vertically should also be mandatory. In circumstances

where lighting is poor, a strobe light is recommended as additional PPE.

• Freezer rooms pose a different hazard to a standard warehouse, therefore prior to starting,

the inspector must always negotiate the safest and most acceptable method possible, to

carry out the inspection and advise a third party that they are working (alone) in a freezer

environment.

Wearing a freezer suit or appropriate warm clothing is mandatory. Time in should be

limited to 30 minutes, with a mandatory time out of 10 minutes or as determined by site

rules. Time out should be spent in a warm room, if available.

Additional equipment required for specific sites may also include:

personal vertical/horizontal alarm or

2-way radio with motion sensor.


Racking Inspector Tool List (minimum recommended requirements):

Copies of AS 4084-1993 and AS 4084-2012

1 metre long spirit level

Laser measure

Tape measure

Digital camera

PDA/tablet (if appropriate)

Printer (if appropriate)

Torch

Clipboard

Working pen and pencil (special pen/pencil required for freezers)

Appropriate paperwork required for the inspection

Laser/dumpy/theodolite (if required)

Copy of design manual or rack layout drawings (where possible) of racks being

inspected

Colour coded stickers

Damage Control Procedures

All inspections should follow the AS 4084-2012 protocol for damage classification, using the Red,

Amber and Green categories.

An inspection report of rack damage (red classification) should initiate a management procedure

for isolating and making safe, sections of seriously damaged racking.

The inspection report should contain observations and proposals for any action necessary, with

recommendations to reduce or eliminate the problem of damage reoccurring.

Methods of Measurement (Fig 1)

Where practicable place a 1000mm straight edge on the face of the damaged member,

keeping the damaged area as close as possible to the centre of the straight edge, then

measure the indentation.

Note: Where practicable always test over a 1000mm span. Where a 1000mm span is unavailable it

is recommended to calculate maximum tolerances over the shorter distance available by pro-rata

adjustment (i.e. 3mm max deflection over 1000mm = 2mm over 600mm).


Figure 1

For an upright bent in the direction of the frame bracing, the maximum gap between the

upright and the straight edge should not exceed 3mm.

For an upright bent in the direction of the rack beam spans, the maximum gap between the

upright and the straight edge should not exceed 5mm.

For an upright that is damaged such that there is damage in both longitudinal and lateral

directions, the left-to-right and front-to-back deformation shall be measured and treated

separately and the appropriate 5mm and 3mm limits observed.

For bracing members bent in either plane, the gap between the straight edge and the bracing

member should not exceed 10mm.

Racking components subjected to tears and splits should be unloaded and replaced

immediately.

Please note: Local deformation of the shape or section at the base of the upright may be

difficult to measure. Where this occurs, the inspector should use his/her best judgement and

make recommendations to replace components where, in his/her opinion, the damage is close

to exceeding tolerances, or is of a nature that they consider will affect the overall stability or

integrity of the rack structure.


Damage Evaluation

The seriousness of structural damage to pallet racking components, should be evaluated, classified

and recorded systematically.

Damage Action Flow Chart


Damage Action Flow Green Risk

Acceptable damage

When the level of damage does not exceed the permissible limits specified in Fig.1 the racking

shall be considered serviceable and does not require either unit load reduction or immediate

unloading.

Damaged components shall be recorded as suitable for further service until the next inspection

and shall be clearly identified (e.g. stick on labels) for specific re-examination and assessment at

future assessments.

NOTE: Exceeding the green level shall be considered hazardous or very serious damage to the

racking system.

Amber Risk

Hazardous damage

When the level of damage exceeds the permissible limits specified in Fig.1, the damaged section shall

be clearly marked and isolated until remedial work has been carried out before the racking can be

reloaded. The client should be informed of all areas rated AMBER and advised of the correct action

to take, and the consequences should correct action not be taken. If remedial work cannot be carried

out within 4 weeks, the level of damage shall be

re-designated as ‘very serious damage’ (red risk).

Red Risk

Very serious damage

When the level of damage is in excess of the permissible limits specified in Fig. 1 by more than a

factor of 2, the damaged section and appropriate adjacent section(s) shall be immediately unloaded

and isolated from further use until remedial work has been carried out and certified as safe. The

client should be informed of all areas rated RED and advised of the correct action to take, and the

consequences should correct action not be taken.

Any repair works shall be in consultation with the racking supplier or a qualified structural

engineer. Note: if any modifications to the original rack structure are identified by the

inspector, the client or user should be notified and checks undertaken that changes were

approved by the rack manufacturer or designer. The client should be advised that any

unauthorised modifications may void any OEM warranty and may not comply with the

standards.

NOTE: Only like for like materials must be used when repairing a damaged rack.

Damaged components must be replaced with new or good quality undamaged second hand

product, but not reworked or copy products.


Examples of a Suggested Inspection Process

Always inspect racks in a systematic order. For example,

Up

Across

Down

OR

Up

Across

Repeat

Look down aisle along the rack for horizontal beam damage / out of plumb frames, etc.


Assessment of Beams- Vertical Deflection

Measuring Deflection

Deflection

Maximum deflection = span/180 (fully loaded beam) Maximum deflection for an unloaded beam = span/900

Beam Span

Beam centre line

Stretch a string line from one end connector to the other across the face of the beam

Measure the distance from the string line to the bottom of the beam at the centre point

Calculate allowable deflection

Loaded deflection Unloaded deflection

Length of beam Length of beam 180 900


Horizontal Beam Deflection

Out-of-plumb Racking

Out-of-plumb racking poses a risk that could eventually lead to rack failure.

Any visible signs of out-of-plumb or signs of the rack leaning must be investigated

immediately. The causes of out-of-plumb racking can be:

• Damage from impact

• Incorrect installation

• Component failure

• Excessive loads

• Concrete floor sinking

• Built on bitumen

Vertical Out-of-plumb (Measurement)

Empty Rack = height/500

Fully loaded Rack = height/200

Deflection

Beam Span

Frame depth

MAXIMUM DEFLECTION = Span / 360

For an unloaded beam


Finished Tolerances

To comply with AS 4084-2012 pallet racking is to be installed to meet finished tolerances as

specified in Section 7 when unloaded.

TABLE 1.7.1(a)

FINISHED TOLERANCES

Type of tolerance (see Figure 1.7.1)

Description

Tolerance, mm

Tolerance, grade I II III

A Maximum variation in individual bays ±3 ±3 ±3 nA Total cumulative deviation in racking length

(nA = total deviation, where n is the number of bays) ±30 ±20 ±10

B Maximum installation out-of-plumb of upright perpendicular to the plane of the upright frames

(down-aisle)

h/500 h/750 h/1000

C Racking depth (single or multiple frames) ±5 ±5 ±5 D String depth ±5 ±5 ±5 Eb Rail positioning with regard to the pallet racking

measured as the difference between the values at the bottom of the upright frames or clear aisle for Graders

I and II

±5 ±5 See FEM 9.831

and FEM 9.832

Et Rail positioning with regard to the pallet racking measured as the difference between the values at the

top of the upright frames or clear aisle for Graders I and II

±5 ±5 See FEM 9.831

and FEM 9.832

F Maximum imperfection of upright with regard to the theoretical longitudinal upright x or y axis

h/1000 h/1000 h/1000

G Maximum installation out-of-plumb of upright in the plane of the upright frame (cross-aisle)

h/500 h/750 h/1000

H Distance between top of base plate and top of lowest beam level

±10 ±7 ±5

J Maximum deviation of beam level or portal level with regard to the lowest beam level

±hi/500 or ±5

±hi/750 or ±4

±hi/1000

S Maximum deviation of adjacent vertical beam spacing ±5 ±3 ±2 NOTE: In Table 1.7.1(a), h is the distance to the topmost beam level and hi is the distance to beam level i, see Fig. 1.7.1.

TABLE 1.7.1(b) TOLERANCE GRADES

Tolerance Grade Type of unit load handling equipment

I Manually operated equipment guided by operator (e.g. wide and narrow aisle racking)

II Manually operated equipment guided by electrical or mechanical devices (e.g. very narrow aisle racking)

III Fully automatically operated equipment guided by electrical or mechanical devices (e.g. ASRS racking)

REF AS 4084-2012


REF AS 4084-2012


Inspection Considerations Load signs

AS 4084-2012 states that the racking installation shall have, in one or more conspicuous locations,

a permanent, corrosive resistant plaque, not less than 125mm long and 250mm high,

mechanically secured to the racking structure at 2m above the floor level.

A typical load sign should contain but not be limited to:

1. Racking manufacturer’s name, supplier’s name and trademark

2. Designer’s name

3. Working unit load limit

4. Total working unit load limit for each pallet beam level

5. Total working unit load limit for each bay

6. Maximum distance from the base plate to the first beam level and maximum

distance between first and second beam levels

7. Installation date

8. Client’s name

Typical racking SWL sign

3

4 6

5

8 2 7

1


Beams

• All beams are fitted with safety clips.

• All connectors are correctly installed in the uprights (no dislodgement).

• No visible deformity of the beam (if this not evident in loaded situation – the beams should

be unloaded and checked).

• Rotation of the beam caused by impact or overloading.

• Sign of cracks in the welds.

• Sign of bowing or bending on beam end connector.

• Sign of corrosion.

• Impact damage to beams.

• Sign of separation of the welded sections.

• Check if the levels correspond to the SWL signage.

Base plates

• Visible damage to the base plate.

• Damaged floor fixings.

• Base plate is secured to frame correctly.

• For selective pallet racking to conform to AS 4084-2012, there must be 2 anchors securing

the base plate to the concrete slab. Installations prior to the 2012 Standard may only have 1

fixing.

Dual fixings to front corners

Or diagonally fix Levelling plates

Do not exceed manufacturer’s minimum stack height.

Twisted and out of vertical stack.

Missing.

Steel.

Loose, missing or dislodged racking components

Loose, missing or dislodged racking components can cause major immediate risks with the

structural integrity of the racking.


Frames

• All uprights are fixed to floor using the correct type floor anchors, for the application (2

floor anchors /base plate required if installed after 28/2/2012 ref AS 4084 2012).

• Signs of visible damage to the upright sections e.g. twisting of the upright; any sign of any

tears or significant dents in the uprights – the frame should be unloaded and not put back

into use until repairs have been completed.

• Signs of visible damage to the bracing sections.

• Rack protection is installed and is in a good state of repair.

Splices

Fitted as per manufacturer’s recommendations.

Large gap (max. 2mm) between spliced sections of upright.

Not spliced below the bottom beam level. (Preferable for lower upright height to be not

less than 60% of overall height.)

Number of splices in upright.

The bottom part of the spliced upright must not be a lighter gauge than the top section.

Corrosion

Severely corroded components can fail without warning. At the first sign of corrosion an

investigation should be carried out to determine the cause of the corrosion. Thin walled

boxed beams could develop corrosion from the inside, and it may take considerable time

before showing signs of any corrosive damage. A collapse could occur before showing signs of

corrosion, therefore special care and consideration should be taken when assessing the risk.

As a guide, blistering on the surface will indicate excessive corrosion is taking place internally.

Pallets

Pallets often get overlooked in the rack inspection process; however pallets can cause damage to

the structure or mobile plant and cause serious injury to persons working in the vicinity.

Pallet should be designed for the racking and lock into position (Australian Standard Pallet –

CHEP type).

All pallets should have front to rear bearers capable of supporting the loaded pallet –

other styles of pallets require additional support (refer customer to manufacturer).

Broken pallets should be removed from the racking – possibility of collapse.

Oversized pallets should not be stored in a rack unless the rack has been designed for the

pallet.

Oversized pallets should not be stored in a standard double entry rack – possibility of

interaction of pallets at the rear of the rack.

Undersized pallets should not be stored in pallet racking – possibility that they can fall

through the rack.

Products should not protrude beyond the pallet unless the rack has been designed

for this situation.

Loose product stored on upper pallet levels should be secured to the pallet (strapped or

wrapped as required) to prevent items falling from height.

Safety mesh should be attached at full height to the rear of the rack structure where


single deep rack backs on to pedestrian walkways.

Plastic pallets should not be used unless there is a locking mechanism to prevent the pallets

sliding on the beams. REF AS 4068-1993

Pallets should conform with requirements of AS 4068-1993


Correct placement of loads

The load on the pallet must be evenly distributed across the whole area of the pallet to avoid any potential uneven

loading of the rack between the front and rear beams.

The correct positioning of two 1000kg loads within a

2000kg compartment. This is an example of good loading practice where

minimum clearances are being adhered to.

This is an example of a badly positioned pallet. Although this

may not be an overload condition it does prevent the storage

of a second pallet and is not good working practice.

This is an overload condition if the capacity per level is

rated at 2000kg UDL. The illustration shows the central

positioning of a single 2000kg pallet that will overload a

pair of beams designed for two 1000kg pallets.


Unit load operating clearances

REF AS 4084-2012

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